me (me.delete@this.me.com) on May 18, 2022 11:35 am wrote:
> > High core count CPU’s are already memory starved, so adding AVX512 is pointless.
> > With 5nm CPU’s you can scratch off the HPC market needing AVX512, as you can’t
> > feed that many CPU’s much less the doubled bandwidth needs of AVX512 units.
> >
>
> AMD obviously disagrees. ISA support doesn't mean that Zen
> 4 has the extra AVX-512 unit like the Big Xeons do.
>
> > That leaves gamers, but with 8 cores you are already pretty starved of dram bandwidth
> > and let’s say one core is using AVX512 and thus heating up. Now all 8 cores are down
> > clocked in response and your net performance uplift of AVX512 is negative.
> >
>
> Games aren't going to use AVX-512 since the consoles don't support it.

Also: Because practically[1] no-one has come up with a good way for games to use (CPU) SIMD.

[1] I can't name a single example, but there are thousands of indie games. Surely some of them make good use of CPU SIMD. Not necessarily AVX-512, but maybe at least SSE.

-JLarja